Hot-air furnace



UNITED STATES PATENT OFFICE.

E. I-I. CAMP, OF JACKSON, MICHIGAN.

HOT-AIR FURNACE.

Specification of Letters Patent No. 32,974, dated August 6, 1861.

To all whom it may concern:

Be it known that I, EDWIN H. CAMP, of Jackson, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Hot-Air Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a vertical longitudinal section through the improved furnace and its flues.

, Fig. 2 is ahorizontal section through Fig. l

indicated by the red line y. y thereon. Fig. 9

o is a transverse section through the upper series of radiators.

Similar letters of reference indicate corresponding parts in the three figures.

To enable those skilled in the art to make and use my invention I will proceed to describe its construction and operation.

A represents the horizontal shell of the furnace which is constructed and put together in the usual manner of making hot air furnaces.

B represents the front wall of the furnace C, the door of the furnace C, the door of the ash-pit C2.

D represents a large cylindrical pipe which is suitably secured to the top, and near the rear end of furnace shell A. This pipe D extends above the shell A a suitable distance and conducts off the products of combustion from the furnace.

E is a horizontal pipe communicating with the pipe D and extending forward in a longitudinal direction through the front wall B of the furnace where it receives a cap a on its front end which can be removed at any time for cleaning out this pipe E.

On each side of and extending in parallel lines with pipe E is a pipe which communicates with the vertical pipe D at one end and passes through wall B at the other end, receiving on this end cap I). These side pipes F, F, also communicate with the middle pipe E near its front end by means of short pipes G, Gr. These three pipes E, F, F form the lower series of radiators all of which can be easily cleaned by removing their respective caps a, b, b. The second or upper series of radiators consist of a longitudinal middle pipe H and two side pipes J, J which have caps c, c, c on their front ends as described for the pipes E, F, F of the lower series. This upper series of radiators communicate with each other through short pipes g, g arranged near their front ends, and the rear ends of these radiators communicate with the vertical pipe D in the same manner as the lower series of pipes do. The radiating pipes are made in sections and bolted together by means of flanges and collars as shown in the drawings, or put together in any other suitable manner.

Now the object of this invention is to obtain a direct draft through the vertical pipe D, when a direct draft is required, and then to cut off this direct draft and conduct the products of combustion through the rad-iators for warming purposes. For this purpose I arrange within the vertical pipe D two dampers K, L, which are pivoted at their respective joints z', z' as shown in Fig. l of the drawings.

The damper K is quite long and of an elliptical shape, or a little more than half as long as the lower damper K. This lower damper K extends from a point below the pipe E some distance above the pipes F, F, and when closed as shown in Fig. l shuts off the direct draft through pipe D and causes all the products of combustion ascending through the lower end of this pipe D to pass through the two horizontal pipes F, F toward the front of the furnace, thence through pipes Cr, Gr', into pipe E, thence back to the pipe D again.

The smoke and hot air are now intercepted from passing directly 0H through pipe D by the damper L, which directs this smoke and hot air into the middle pipe I-I of the upper series through this pipe and thence through the side pipes J J back again into the vertical pipe D above the upper damper L. The smoke, etc.,now pass olf through the pipe D, having been conducted through the radiating pipes of both the upper and lower series. When the dampers K and L are opened or changed from inclined to vertical positions they will not intercept the passage of the smoke, etc., through the pipe D, and a direct draft through vertical pipe D is obtained.

The damper rod 71 has an arm h fixed on one end, outside of pipe D to the end of which arm a rod N is attached, and this rod N is carried forward, passed through wall B and lfurnished with a handle N on this end so that the dampers K L can be operated from the front of the furnace. The damper L is operated by the movements of damper K and for this purpose the rod z' of damper L is below the middle of the length of this damper and the lower end of this dalnper'L touches the surface of damper K, so that the upper ends of the two dampers are simultaneously moved toward each other in opening the pipe D and in shutting the damper K, the damper L will close by its own gravity and assume the position shown in Fig. 1 of the drawings. Thus by the end movement given to rod N both dampers are operated and the heated air and Smoke can be directed through both series of radiators, or Caused to pass directly through the Vertical pipe D.

Having thus described my invention what I Claim as new and desire to secure by Letters Patent is:

The arrangement of the dampers K, L, rod N, and Vertical pipe D, with the shell A, and radiators E, F, F', H, J, J', G, all in the manner herein shown and described.

E. H. CAMP.

VTitnesses ETHAN H. RICE, WM. H. VAN HORN. 

